c Ampicillin boluses.

21 C.F.R. § 520.90c
in effectEffective: 2024-07-01
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(a) Specifications. Each bolus contains ampicillin trihydrate equivalent to 400 milligrams of ampicillin. (b) Sponsor. See No. 054771 in § 510.600(c) of this chapter. (c) Related tolerances. See § 556.40 of this chapter. (d) Conditions of use in nonruminating calves—(1) Amount. 5 milligrams per pound of body weight twice daily not to exceed 4 days. (2) Indications for use. Oral treatment of bacterial enteritis (colibacillosis) caused by E. coli. (3) Limitations. Treated calves must not be slaughtered for food during treatment and for 7 days after the last treatment. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

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